npm uninstall -g angular-cli npm install -g @angular/cli@latest
For updating angular cli type this command : ng update @angular/cli @angular/core
npm update @angular/cli -g
content_copy ng update @angular/cli @angular/core
ng update @angular/cli@8.1.1 @angular/core@8.1.1
rm -rf node_modules npm uninstall --save-dev angular-cli npm install --save-dev @angular/cli@latest npm install
npm install --save-dev @angular/cli@9.1